Figure 3: Growth of R. opacus PD630 on high glucose concentrations in flask cultures. Glucose concentrations tested in defined medium containing 1.4 g l-1 (NH4)2SO4 were 200 g l-1 (●), 250 g l-1 (□), 300 g l-1 (♦) and 350 g l-1 (Δ). Initial inoculum density was adjusted to obtain an OD660 of 1.0. The error bars represent the standard deviation of three separate replicates of each experiment.